Contact-breaker for induction-coils.



PATBNTBD JUNE 18, 1907.

F. B. GRIFFIN. CONTACT BREAKER FOR INDUCTION OOILS.

APPLICATION FILED DEC. 3, 1906.

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FRANK B. GRIFFIN, OF OSIIKOSH, WISCONSIN, ASSIGNOR TO FRANK S. FELL AND WILLIAM It. HILL, BOTH OF OSHKOSH, WISCONSIN.

CONTACT-BREAKER FOR INDUCTION-COILS- Specification of Letters Patent.

. Patented June 18, 1907.

Application filed December 3, 1906. Serial No. 346,161.

To all whom it may concern.-

Be it known that I, FRANK B. GRIFFIN, a citizen .of the United States, residing at Oshkosh, in the county of Winnebago and State of Wisconsin, have invented certain new and useful Improvements in Contact-Breakers for Induction-Ooils, of which the following is a specification.

My invention relates to contact-breakers for induction-coils.

The objects of my invention are to provide a positive action of the spring, a thorough break and an adjusted bearing relative to the spring power.

An important feature of my invention is an adjustable stud or lug that is to be properly adjusted at the manufactory relative to the s ring tension and then rendered non-adjusta le so that in ordinary usage the operator cannot disarrange the adjustment. After the vibrator is tested and adjusted at the manufactory, future adjustment can only properly be made by the ordinary thumbscrew adjustment.

In the accompanying drawing Figure 1 represents a plan view and Fi 2 a vertical section of my invention. Fig. 3 illustrates a plan view of the spring-base.

Referring to the drawings by numerals, 2 represents the coil casing, 3 the spring-base attached thereto, as by ordinary screws 4, 4.

5 represents the primary spring and 6 a downwardly curved secondary spring both seated in the depression 7 in the spring-base or head 3 and preferably secured by the setscrew 8 passing through ordinary eyes in both springs and into the threaded opening 9.

10 represents an extension to the springbase for the pur ose of carrying the stud 11. I regard the stu 11 as an'important feature of my invention. It will be observed that it is threaded at the base and may be passed through a corresponding threaded opening in the extension 10 and, in its ressure against the springs 5 and 6, thoroug ly and exactly adjusted with reference to the tension of the springs. This is properly done at the manufactory and after proper adjustment the lower portion of the stud is preferably cut away in line with the line of the base or the casing so as to effectually prevent further manipulation of this adjustment, by an ignorant operator. In the use of vibrators heretofore Where double adjustments have been provided, the efiiciency of the vibrator has been destroyed by losing the primary adjustment'jand then failing to regain a relative adjustment between the two adjustments.

In my invention, the ordinary secondary adjustment is used com rising the bridge 12, and the thumb-screw a justment 13 carrying one of the platinum points 14, the opposite platinum point 15 being located upon the spring 6.

I provide a thin armature 16 with a minimum weight. By means of the secondary downwardly curved spring 6 and the delicate adjustment of the stud 11, I afford an absolute break without a tremble and thus assure a lon unbroken spark from the spark-plug. The double spring serves to balance the vibration.

What I claim is 1. A device of the character described, comprising a base plate, a magnet mounted adjacent thereto, an armature for said. magnet, a spring for said armature, said spring being secured to said base, means on said base for regulating the tension of said spring, and means positioned adjacent to said magnet for assisting said tensioning-means and holding said spring in a predetermined position. 4

2. A device of the character described, comprising a casing and a magnet mounted therein, a contact breaker for said magnet comprising a plurality of springs and means for varying the tension of said spring.

3; A circuit breaker, comprising a base, a straight flat spring, means for adjusting the vibration of said spring, and means for damping the movement of said spring.

4. A circuit breaker comprising a base, a vibrating spring secured thereto, means near one end thereof for regulating the angle of said spring when out of operation, and ad justing means at the opposite end of said spring for regulating the length of the movement of said spring.

5. A circuit breaker comprising a base, a vibrator mounted thereon, a bowed spring in contact with said vibrator for preventing trembling of the same and means for regulating the tension of said spring.

6. A circuit breaker comprising a base and vibrator, a plurality of means for regulating the tension of said vibrator, and means for damping the tremble of said vibrator.

7. A circuit breaker comprising a base, a vibrator secured thereto, adjustable means for normally holding said vibrator in an elel mitting the vibrator to operate with but one vated position, a bowed spring for preventvibration for each rupture of the circuit.

ing trembling during the movement of said In testimony whereof I have signed my vibrator and a set screw for regulating the I name to this specification in the presence of 5 tensigii of said spring. b 1 two subscribing witnesses.

8. circuit brea er com risin a ase, a vibrator secured thereto, a justa ble means FRANK GRIFFIN for varying the length of vibration of said vibrator, adjustable means for regulating the IQ tension of said vibrator, and means for per- 1 Witnesses:

W. W. WATERHOUSE, WM. B. STIOKNEY. 

